Automatic blowpipe.



No. 725,769. PATENTED APR. 21, 1903.

- A. `PAINGEN.

AUTOMATIC BLOWPIPE.

APPLICATION FILED FEB. 25, 1903.A

no MODEL.

1i- 10 'Azz A "l I *f W' asses 1 op.

Ay '3 y .f/

m: Dams rrrzns co, PHoYmLm-m, wAsHlNoTo. asc.

UNiTsn STATES AUGUST PRINCEN, OF MINNEOTA, MINNESOTA.

PATENT FFICE.

AUTOMATIC BLOWPIPE.

SPEGIFIGATION forming part of Letters Patent No. 725,769, dated April21, 1903. Application tiled February 25, 1903. Serial No. 145,054. (Nomodel.)

To all whom it may concern,.-

Be it known that I, AUGUST PRINCEN, a citizen ofthe United States,residing at Minneota, in the county of-Lyon and State of Minnesota, haveinvented a new and useful Automatic Blowpipe, of which the following isa specification.

This invention relates to blast-lamps or automatic blowpipes, which areused for a great Variety of purposes, but more especially by jewelersfor the purpose of creating an intense heat and concentrating the sameupon a certain point Without the assistance of a blowpipe.

y invention has for its object to provide a device of this class whichpossesses superior advantages in point of simplicity, durability, andgeneral efticiency.

With these ends in view my invention consists in the improvedconstruction, ar rangement, and combination of parts, which willbehereinafter more fully described, and particularly pointed ont in theclaims.

In the accompanying drawings, Figure .1 is a side elevation of a deviceconstructed in accordance with the principles of my invention. Fig. 2 isa 'vertical sectional view of the same.

Corresponding parts in both figures are indicated by similar numerals ofreference.

The body of my improved lamp or automatic blowpipe is composed of areservoir 1, which is preferably cast of brass or other suitable metaland which is provided with a horizontal diaphragm 2, whereby itisvdivided into an upper and a lower compartment, (designated,respectively, 3 and 4.) VThe upper compartment is provided with a .neck5*, having a tightly-fitting cover 6, and with a tubular extension 7, inwhich Vis seated a safety-Valve 8, which may be of any suitableconstruction, it being preferably held to .its seat by means of a springA9 of sufficient strength. The compartment 3 is furthermore providedwith a horizontally-extending generator-tube 10, which is preferablycomposed of an inner member 11, integral with the tank or vessel, and anouter member 12, tightly connected with the member 1l by ascrew-threaded connection. Said outer member is also provided in itsunder side with an opening 12a, from which a generator-tube 14,

of small diameter, extends outwardly below the said member 12 of thegenerator-tube.

The lower compartment 4 of the tank is provided with a filling-opening15, having a tightly-fitting cover 16. Said compartment is also providedwith an upwardly-inclined wick-tube 17, having a sleeve 18, whereby theflame may be regulated, as will be readily understood, by adjusting thesleeve so as to cover a greater or smaller portion of the wick. y

It is essential thatthe upper compartment of the tank shall beabsolutely air-tight, the safety-valve being provided to avoid danger ofexcessive pressure within said chamber.

The operation of this device will be readily understood. Alcohol is thefuel preferred, although naphtha, gasolene, or other light hydrocarbonmay be used. By igniting the wick 19 in the tube 17, which is extendedupwardly to within a short distance of the generator-tube 10, the latterwill soon be heated and the liquid fuel, whereby the outer end of theWick 20 within said tube is saturated, will be transformed into vapor.The only escapeopening for the latter isthrough the constricted tube 14,at the exit of which it becomes ignited and is forcibly ejected, owingto the back pressure within the compartment 3 of the tank.. Should thispressure at any time become excessive, it will be relieved by thesafety-valvev, as will be understood.

This device, as will be seen, is of extremely simple construction, andit may be conveniently manipulated with excellent results.

I desire it to be understood that I do not limit myself as to thestructural details of this device, but reserve to myself the right toany changes and modifications which may be resorted to Without departingfrom the spirit of my invention.

Having thus described my invention, I claim- 1. A device of the classdescribed, comprising a tank having a horizontal diaphragm, a wick-tubeextending upwardly from the lower compartment and havingaregulating-sleeve, a generator-tube extending outwardly from the uppercompartment above said wick-tube and having a burner-tube connected withan IOO having upper and lower compartments, a

wick-tube extending upwardly from the lower compartment, and agenerator-tube extending outwardly from the upper compartment above saidwick-tube, said generator-tube comprising separable members, one ofwhich is integral with the tank and the other of which is closed at itsouter end and provided with a oonstrieted burner-tube.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

AUGUST PRINCEN.

Witnesses:

O. L. DoRR, O. W. REESE.

